138304069 has 2 divisors, whose sum is σ = 138304070. Its totient is φ = 138304068.

The previous prime is 138304043. The next prime is 138304079. The reversal of 138304069 is 960403831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84824100 + 53479969 = 9210^2 + 7313^2 .

It is a cyclic number.

It is not a de Polignac number, because 138304069 - 2⁷ = 138303941 is a prime.

It is a super-4 number, since 4×138304069⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138304009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69152034 + 69152035.

It is an arithmetic number, because the mean of its divisors is an integer number (69152035).

Almost surely, 2^138304069 is an apocalyptic number.

It is an amenable number.

138304069 is a deficient number, since it is larger than the sum of its proper divisors (1).

138304069 is an equidigital number, since it uses as much as digits as its factorization.

138304069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 138304069 is about 11760.2750393007. The cubic root of 138304069 is about 517.1441931756.

The spelling of 138304069 in words is "one hundred thirty-eight million, three hundred four thousand, sixty-nine".